Malicious PDF — malware analysis report

Static analysis result for SHA-256 95373be92df049c6…

MALICIOUS

PDF

59.2 KB Created: 2021-09-30 12:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3fd778e15d8836f8ef9af3af0b5ba431 SHA-1: addc786d0d491383c042dc2aa7e5d0c64292f40d SHA-256: 95373be92df049c66a624b25983ab12ef9040368c105fcec62962a06661a4f43
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by an ML classifier as malicious and contains numerous embedded URLs pointing to a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the PDF is designed to create a large number of links on disposable hosting, suggesting a tactic to manipulate search engine results or redirect users to potentially harmful sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

Heuristics 3

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614d3e98db8e4---danisolegaweridexikuzi.pdf In PDF document text
    • https://vegas-shop.net/uploads/files/xewupevoresaxurapij.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/ratezefajilojiviwovarus.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/xeravimos.pdfIn PDF document text
    • https://wojczak.pl/userfiles/file/68474563124.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/biwozozasonigen.pdfIn PDF document text
    • http://scpt.it/userfiles/files/25209363851.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/45289399862.pdfIn PDF document text
    • https://eniedu.com/data/file/20210908001057.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/86376560820.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/lusibusigu.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210926135901.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/8eb5020f3cd7367528b3611bb1f6ae6a/62102914573.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/xopetetopufitoro.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/jegoxabajolivinubi.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/nuvabitunebasakixopofoza.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/43239840966.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/50177190608.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/92396926561.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/80590459340.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/mevafij.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/96583539164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=top+fighting+games+for+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6A 10860 bytes
SHA-256: d147532fea415b20cd88b3713770f86f78cdf39953c14c41a5b1bf18986c59d2
font_01_sfnt_off0000c71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71C 16588 bytes
SHA-256: df88289a0baea918ecab0d48aff9b9a2c784b16841edecbed273b62feb54bbb0